Bellows, adjusting pressure of, 5, 6. Bellows, foot, 5, 6. Bending tubes, 23. Blackening, 58, 101. Branching, 18, 19. Brushes of spun glass, 53. Blowpipe flame, quality of, 3. Blowpipe for mouth blast, 80, 82, 84. Blowpipe, for paraffin wax, 82, 88. Blowpipe, Herepath's, 2. Blowpipe jet, centring, 3, 98. Blowpipe jet, dirt in, 3. Blowpipe jet, multiple, 4, 40. Blowpipe, Letcher's, change, 4. Blowpipe, simple form of, 80. Bulb, medially on tube, 22. Bulbs, 19, 20, 22, 38, 98. Bulbs, absorption, (Liebig's), 21, 23. Bulbs, dividing, 39, 95. Bulbs from rod, 25. Bulbs, internal, 38. Bulbs, thick, 21. Cages, from glass rod, 24, 25, 27. Calibration, 72. Carius tubes, 16. Condenser, Liebig's, 37. Condensers, various, 37, 38. Cone, carbon, 8. Crack, leading, 30, 99. Cracking, subversive, 103. Cutting glass with diamond, 30. Cutting tubes, 11, 99. Diamond (glazier's), use of, 30. Dissimilar glass, joining of, 22, 94. Drilling, 61. Electrodes, sealing in, 42, 97. Etching glass, 70. Extemporised appliances, 80. Examination of apparatus, 93. Failure, Haste chief Source of, 103. Failures, Notes as to, 97. File, with oblique ground edge, 7. Filing glass, 63. Filter pumps, 35 Foot, 25 Fuels various, 82, 86, 87, 89. Funnel, thistle, 23. General principles and precautions, 1, 97 Glass, varieties of, 9, 55, 91-97. Graduation, 72-76 Haste, Source of Failure, 103 Heat reflector, asbestos, 7. Heating, intensive, 7, 57. Heating precautions, 12, 98 Joining dissimilar glass, 22. Joining glass to metal, 76. Joining tubes, 16, 94, 100. Knife, Glass blower's, 7, 99. Lenses, grinding, 63. Marking glass, 69. Methods, analytic study of, 91, 93. Oxygen for intensive heating, 57, 101. Precautions and General Principles, 1, 97. Pumps, Filter, 35. Pumps, Sprengel, 49, 50. Re-entering branch, 40. Reflector of heat, asbestos, 7. Rod, uses and articles from, 17, 25, 27, 28. Rod, blowing to hollow, 17, 25, 26, 91. Scrap glass, working, 90. Sealing tubes, 12, 13, 14. Sealed tubes for pressure, 15, 16. Sealing in of Electrodes, 42, 97. Seals, internal (airtraps), 32, 102. Silvering glass, 77. Soldering glass, 76. Soxhlet-tube, 40. Spirals, 23, 95. Spray arrester, 34. Spray producers, 36. Sprengel pumps, 49, 50. Spinning glass, 51. Stopcocks, 60, 66. Stoppering, 63. Stirrers, 28, 29. Summary as to precautions and failures, 97. Taps, 60, 66. Thermometers, Various, 44-49. Thermo-regulator, 24. Thistle Funnel, 23. Tools, Various small, 7. Turn-pins, 7, 8, 99. Turning out open ends, 14, 99. PRINTED IN GREAT BRITAIN BY W. JOLLY & SONS, LTD., PRINTERS, ABERDEEN.